The Cvp-90Adjelb is a finely finished durable stainless steel adjustable vent line for those though to be exactly certain measurement situations. This adjustable line has a simple push on connection, anti-corrosive and heat resistant connections, and is compatible with all heaters from the DVC series. As part of the N-Vent series, this product is UL approved category III venting, and is an integral part of the quick-snap connection system, known for easy installation and forming tight seals. Adjustable: No need to cut this vent line, as its length is adjustable in length from 12.6"-15.8". The versatility of its length is paired with single-wall penetration construction and ease of install design making it the perfect fit in almost any circumstance. In addition, the kit is part of the N-Vent series so it's approved for tankless and boiler stainless steel exhaust installations, enabling you to know you've made the right choice in both form and function. Features: For all Noritz DVC heater series Push-on connection Single-wall penetration Adjustable for easy installation Heat and chemical resistant rubber O-ring for secure sealing Introducing the latest advancements in tankless water heater technology for your home, Noritz tankless hot water heaters are both eco-friendly and energy efficient, providing savings up to 40% in utility costs. Their gas water heaters warm water on demand, which means you'll always have hot water and it will never run out.